Been playing the Insurgency Mod for HL2 , they just came out with a brand new update 2.1 but it has a few bugs they need to fix... they did make the models better although they super powered the American weapons a bit too much... they make the Russian weapons less accurate which I think is complete bull! but whatever....
It's a fun Mod about 688MB in size, and what I like a lot is that there are no crosshairs only iron sights for all the weapons except for the sniper rifles...
When they get a few quick updates to the game it will be more fun!
http://www.insmod.net/
Check it out!